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  • Gabbro (pronounced /ˈɡæbroʊ/) refers to a large group of dark, coarse-grained, intrusive mafic igneous rocks chemically equivalent to basalt. Gabbro is dense, greenish or dark-colored and contains pyroxene, plagioclase, amphibole, and olivine (olivine gabbro when olivine is present in a large amount). — “Gabbro - Wikipedia, the free encyclopedia”,
  • These intrusions formed a sill some 16 km thick,[15] primarily of gabbro, but with significant amounts of anorthosite and other related granitic rocks.[16] The Duluth Complex is one of the largest intrusions of gabbro on earth,[17] and one of the largest layered mafic intrusions known. — “Duluth Complex - Wikipedia, the free encyclopedia”,
  • Gabbro is part of WikiProject Geology, an attempt at creating a standardized, informative, The first sentence under the Petrology section makes no sense to me: "Gabbro is an extrusive melting lava." Gabbro is an intrusive rock type, not extrusive, and would form from magma rather. — “Talk:Gabbro - Wikipedia, the free encyclopedia”,


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